1. The increase in grain production is the main problem of agriculture … … … .
2. Edible grain is the most important ... of human food.
3. Wheat is a valuable grain crop ... to different soil and climatic conditions.
4. There are some farm crops which may be grown for many different ... .
5. Carrots, beets and radishes are nutritious… … .
6. The growing of a large-seeded legume as a … … is useful for increasing soil fertility.
7. Sugar beet is a biennial crop ... food the first year and producing seed the second year.
8. Rice, sorghum and millets ... wheat belong to cereals.
9. ... are a very important human food crop as their tubers are high in protein and vitamins.
10. The seed of cotton, flax and other ... crops may be ... into oil widely used by man either as food or as industrial material.
13. Use the verb in brackets in the appropriate form (Participle I, Participle II, the Gerund. Complete the task in written form.
1. Grain is the product (to obtain) by man by (to grow) cereals.
1. These are the two crops (to differ) in the structure of the roots.
2. Some soils are rich in all kinds of food (to require) by plants.
3. The grain crops (to require) cool conditions for their best growth are wheat, barley, oats and rye.
4. Crop production can be raised by (to cultivate) new land or by (to increase) crop yields.
5. We know many environmental factors (to influence) the growth of farm crops.
6. Corn, sorghum, rice and millets are the crops (to adapt) to conditions of short day.
14. Translate from Russian into English. Use the Vocabulary Focus and text A of this Unit. Complete the task in written form.
а)
1. Пшеница широко выращивается во всем мире.
2. Зерно может использоваться в кормлении скота.
3. Хлопок и лен – наиболее ценные прядильные культуры, используемые для многих целей.
4. Большинство корнеплодов используется в пищу человека.
5. Зерновые культуры убираются машинами.
6. В отличие от зерновых культур, картофель производит семена на второй год.
b)
1. Полевые культуры можно классифицировать или согласно их использованию, или согласно сходству их частей.
2. С точки зрения агрономии полевые культуры делятся на шесть основных групп.